Toro 98957SL Rev B Sand Pro 2020 3020 5020 Service Manual

Chapter 4
Hydraulic Systems
Table of Contents
SPECIFICATIONS   . . . . . . . . . . . . . . . . . . . . . . . . . . . .   2
GENERAL INFORMATION  . . . . . . . . . . . . . . . . . . . . .   3
Hydraulic Hoses  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   3
Hydraulic Fitting Installation  . . . . . . . . . . . . . . . . . . .   3
Towing Traction Unit   . . . . . . . . . . . . . . . . . . . . . . . . .   5
Check Hydraulic System Fluid . . . . . . . . . . . . . . . . .   5
HYDRAULIC SCHEMATICS  . . . . . . . . . . . . . . . . . . . .   6
Sand Pro 2020/3020  . . . . . . . . . . . . . . . . . . . . . . . . .   6
Sand Pro 5020  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .   7
HYDRAULIC FLOW DIAGRAMS . . . . . . . . . . . . . . . .   8
Traction Forward   . . . . . . . . . . . . . . . . . . . . . . . . . . . .   8
Traction Reverse  . . . . . . . . . . . . . . . . . . . . . . . . . . .  10
Retract and Extend Lift Cylinder  . . . . . . . . . . . . . .  12
SPECIAL TOOLS  . . . . . . . . . . . . . . . . . . . . . . . . . . . .  14
Hydraulic Pressure Test Kit . . . . . . . . . . . . . . . . . . .  14
Hydraulic Tester – Pressure and Flow  . . . . . . . . . 14
Hydraulic Test Fittings  . . . . . . . . . . . . . . . . . . . . . . .  15
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . .  16
TESTING  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  19
Precautions for Hydrostatic Testing . . . . . . . . . . . .  19
TEST NO. 1: Traction Pump Flow (P1)   . . . . . . . . 20
TEST NO. 2: Charge Relief Valve (R2)
Hydrostat (SP 5020)  . . . . . . . . . . . . . . . . . . . . . . . .  44
Removal  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  44
Installation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  45
Flush Hydraulic System . . . . . . . . . . . . . . . . . . . . . .  47
Hydrostat Service . . . . . . . . . . . . . . . . . . . . . . . . . . .  48
Charge Pump Disassembly, Inspection,
and Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . .  49
Shaft Seal Removal and Installation  . . . . . . . . . .  50
Acceleration Valve Disassembly, Inspection,
and Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . .  51
Charge and Implement Relief Valve
Disassembly, Inspection, and Assembly  . . . . . 51
Charge Check Valve Disassembly,
Inspection, and Assembly  . . . . . . . . . . . . . . . . .  51
Traction Pump Disassembly  . . . . . . . . . . . . . . . . .  52
Traction Pump Inspection  . . . . . . . . . . . . . . . . . . .  53
Traction Pump Assembly . . . . . . . . . . . . . . . . . . . .  54
Front Wheel Motor  . . . . . . . . . . . . . . . . . . . . . . . . . .  56
Removal  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  56
Installation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  57
Rear Wheel Motors (SP 2020/3020) . . . . . . . . . . . 58
Removal and Installation  . . . . . . . . . . . . . . . . . . . .  59
Rear Wheel Motors (SP 5020) . . . . . . . . . . . . . . . .  60
Removal and Installation  . . . . . . . . . . . . . . . . . . . .  61
Wheel Motor Service  . . . . . . . . . . . . . . . . . . . . . . . .  62
Disassembly   . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  63
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  64
Assembly  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  66
Hydraulic Tank (SP 2020/3020) . . . . . . . . . . . . . . .  70
Removal, Inspection, and Installation  . . . . . . . . . 71
Hydraulic Oil Cooler (SP 2020/3020)  . . . . . . . . . . 72
Removal, Inspection, and Installation  . . . . . . . . . 73
Hydraulic Tank and Oil Cooler (SP 5020)   . . . . . . 74
Oil Cooler Removal   . . . . . . . . . . . . . . . . . . . . . . . .  74
Oil Cooler Inspection  . . . . . . . . . . . . . . . . . . . . . . .  75
Oil Cooler Installation . . . . . . . . . . . . . . . . . . . . . . .  76
Hydraulic Tank Removal,
and Implement Relief Valve (R1)  . . . . . . . . . . . .  22
TEST NO. 3: Charge Pump (P2) Flow  . . . . . . . . . 24
TEST NO. 4: Wheel Motor Efficiency  . . . . . . . . . .  26
ADJUSTMENTS  . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  28
Adjust Traction Pedal for Neutral . . . . . . . . . . . . . .  28
Adjust Traction Pedal for Forward
(SP 2020/3020) . . . . . . . . . . . . . . . . . . . . . . . . . . .  28
Adjust Traction Pedal for Forward (SP 5020)  . . .  29
Adjust LIft Lever (SP 2020/3020)   . . . . . . . . . . . . .  30
Adjust LIft Lever (SP 5020) . . . . . . . . . . . . . . . . . . .  30
SERVICE AND REPAIRS  . . . . . . . . . . . . . . . . . . . . .  31
Check Hydraulic Lines and Hoses . . . . . . . . . . . . .  31
Charge Hydraulic System . . . . . . . . . . . . . . . . . . . .  31
Change Hydraulic System Fluid and Filter . . . . . . 32
Lift Valve (SP 2020/3020) . . . . . . . . . . . . . . . . . . . .  34
Removal and Installation  . . . . . . . . . . . . . . . . . . . .  35
Lift Valve (SP 5020)  . . . . . . . . . . . . . . . . . . . . . . . . .  36
Removal and Installation  . . . . . . . . . . . . . . . . . . . .  37
Lift Valve Service  . . . . . . . . . . . . . . . . . . . . . . . . . . .  38
Lift Cylinder (SP 2020/3020)  . . . . . . . . . . . . . . . . .  39
Lift Cylinder (SP 5020)  . . . . . . . . . . . . . . . . . . . . . .  40
Lift Cylinder Service . . . . . . . . . . . . . . . . . . . . . . . . .  41
Hydrostat (SP 2020/3020)  . . . . . . . . . . . . . . . . . . .  42
Removal  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  42
Installation  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  43
Inspection, and Installation  . . . . . . . . . . . . . . . .  76
Sand Pro 2020/3020/5020
Page 4 – 1
Hydraulic System (Rev. A)
Product Specification
CategoriesLawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals
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- 170 pages
Document TypeService Manual
LanguageEnglish
Product BrandToro. Customer Service Representatives are available by phone: Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
Canada 1-888-225-4886 USA 1-888-384-9939, Lawn Mower
Document File TypePDF
Publishertoro.com
Wikipedia's PageToro Company
CopyrightAttribution Non-commercial
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